Nucleic acids. Adding to the genetic alphabet.
Orgel
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LE
D005075:Biological Evolution; D004259:DNA-Directed DNA Polymerase / Q000502:physiology; D012321:DNA-Directed RNA Polymerases / Q000502:physiology; D005815:Genetic Code; D009690:Nucleic Acid Conformation
D012321:DNA-Directed RNA Polymerases; D004259:DNA-Directed DNA Polymerase